Struct DataTypeLayout

pub struct DataTypeLayout {
    pub buffers: Vec<BufferSpec>,
    pub can_contain_null_mask: bool,
    pub variadic: bool,
}

Layout specification for a data type

Fields

buffers: Vec<BufferSpec>

A vector of buffer layout specifications, one for each expected buffer

can_contain_null_mask: bool

Can contain a null bitmask

variadic: bool

This field only applies to the view type DataType::BinaryView and DataType::Utf8View If variadic is true, the number of buffers expected is only lower-bounded by buffers.len(). Buffers that exceed the lower bound are legal.

Implementations

impl DataTypeLayout

pub fn new_fixed_width<T>() -> DataTypeLayout

Describes a basic numeric array where each element has type T

pub fn new_nullable_empty() -> DataTypeLayout

Describes arrays which have no data of their own but may still have a Null Bitmap (e.g. FixedSizeList)

pub fn new_empty() -> DataTypeLayout

Describes arrays which have no data of their own (e.g. RunEndEncoded).

pub fn new_binary<T>() -> DataTypeLayout

Describes a basic numeric array where each element has a fixed with offset buffer of type T, followed by a variable width data buffer

pub fn new_view() -> DataTypeLayout

Describes a view type

pub fn new_list_view<T>() -> DataTypeLayout

Describes a list view type

Trait Implementations

impl Debug for DataTypeLayout

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl PartialEq for DataTypeLayout

fn eq(&self, other: &DataTypeLayout) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for DataTypeLayout

impl StructuralPartialEq for DataTypeLayout